Title (fr)

Publication

Application

Priority

US 9707775 W 19970507

US 64392596 A 19960507

Abstract (en)

[origin: WO9742361A1] Ultra-oriented, crystalline synthetic filaments with a combination of high tenacity, high dimensional stability, high modulus, and a high fraction of taut-tie molecules are produced by extruding a fiber-forming synthetic polymer melt into a liquid isothermal bath (4), withdrawing the filaments from the bath and then post-treating them at a very low draw ratio. The bath (4) is preferably maintained at a temperature of at least 30 DEG C above the glass transition temperature of the polymer to enhance the orientation and promote the formation of stable extended chains. Polymer filaments so produced are characterized in that they have ultra-high birefringence, high tenacity and modulus, a high dimensional stability, and a high fraction of taut-tie molecules.